As the time pass in this modern world many changes came into the field of display devices. First came the small LED (Light Emitting Diode) display which shows numeric contain then after jumbo CRT (cathode ray tubes) which is used... more
As the time pass in this modern world many changes came into the field of display devices. First came the small LED (Light Emitting Diode) display which shows numeric contain then after jumbo CRT (cathode ray tubes) which is used today also but due bulkiness we do not carry from one place to another and also required large area. Then after came LCD (Liquid crystal display) which is lighter and easy to carry, but the main problem with LCD is that it cannot seen clear picture from different angles. This all problem will be overcome by revolutionary discovery of OLED (Organic Light Emitting Diode). OLEDs can be fabricated using Polymers or by small molecules in the flat panel display zone unlike traditional LiquidCrystal Displays OLEDs are self luminous & do not required any kind of backlighting. This eliminates the need for bulky & environmentally undesirable mercury lamps and yields a thinner, more compact display. Unlike other flat panel displays OLED has a wide viewing angle (up to 160 degrees), even in bright light. Their low power consumption (only 2 to 10 volts) provides for maximum efficiency and helps minimize heat and electric interference in electronic devices. These are Cheaper, Sharper, Thinner, and Flexible.
Nanostructured ZnO has been synthesized by wet chemical route. Poly(vinylpyrrolidone) is used for stabilization and surface passivation of synthesized nanoparticles, thus tailoring the growth of ZnO at nanoscale. Structural... more
Nanostructured ZnO has been synthesized by wet chemical route. Poly(vinylpyrrolidone) is used for stabilization and surface passivation of synthesized nanoparticles, thus tailoring the growth of ZnO at nanoscale. Structural characterization using X-ray diffraction, scanning electron microscopy, high-resolution transmission electron micoroscopy and Fourier transformed infrared spectroscopy of the synthesized nanoparticles confirm the evolution of nanocrystalline ZnO prevailing in hexagonal wurtzite phase. UV–Vis and photoluminescence spectroscopy studies show blue shift phenomenon in the synthesized nanoparticle in contrast to the bulk ZnO furnishing evidence in support ofquantumsizeeffect.ThenanocompositesofZnOand poly [9,9-dioctylfluorenyl-2,7-diyl] are prepared and characterizedtoinvestigateits luminescent and spectral emission effects. The nanocomposites are then incorporated in light-emitting diodes, and influence of ZnO on the device performance has been explored via electroluminescence, current density evaluation, and corresponding CIE coordinates calculation.
ABSTRACT New techniques for manipulating surface wettability have been recently presented and a wide variety of techniques have been developed for fabricating 3D structures of interest in the optics, photonics and nanotechnology fields.... more
ABSTRACT New techniques for manipulating surface wettability have been recently presented and a wide variety of techniques have been developed for fabricating 3D structures of interest in the optics, photonics and nanotechnology fields. The so called soft lithography is able to transfer microscale patterns to a substrate by using an elastomeric stamp or mold, typically made of polydimethylsiloxane (PDMS). This technique allows one to develop biocompatible lab-on-chip devices for a wide variety of applications ranging from organic LED to cell and tissue engineering and biomolecular analysis.
